Home / 198,517.02-297,738.81-90,420.90

Finding the Fourth Proportional to 198,517.02, 297,738.81 and 90,420.90

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Solution

The fourth proportional to 198,517.02, 297,738.81 and 90,420.90 is: 135,614.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,517.02 : 297,738.81 = 90,420.90 : x
  2. Step 2: Convert to fraction form
    198,517.02/297,738.81 = 90,420.90/x
  3. Step 3: Cross multiply
    198,517.02x = 297,738.81 × 90,420.90
  4. Step 4: Simplify right side
    198,517.02x = 26,921,811,165.13
  5. Step 5: Solve for x
    x = 26,921,811,165.13/198,517.02
  6. Step 6: Final answer
    x = 135,614.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.